<HTML>
<BODY>
<PRE>
<!-- Manpage converted by man2html 3.0.1 -->

<B><A HREF="ISALNUM.html">ISALNUM(3)</A></B>	       FreeBSD Library Functions Manual 	    <B><A HREF="ISALNUM.html">ISALNUM(3)</A></B>


</PRE>
<H2>NAME</H2><PRE>
     <B>isalnum</B> - alphanumeric character test


</PRE>
<H2>SYNOPSIS</H2><PRE>
     <B>#include</B> <B>&lt;ctype.h&gt;</B>

     <I>int</I>
     <B>isalnum</B>(<I>int</I> <I>c</I>)


</PRE>
<H2>DESCRIPTION</H2><PRE>
     The <B>isalnum</B>() function tests for any character for which <B><A HREF="isalpha.html">isalpha(3)</A></B> or
     <B><A HREF="isdigit.html">isdigit(3)</A></B> is true.  In the ASCII character set, this includes the fol-
     lowing characters:

     060 ``0''	   061 ``1''	 062 ``2''     063 ``3''     064 ``4''
     065 ``5''	   066 ``6''	 067 ``7''     070 ``8''     071 ``9''
     101 ``A''	   102 ``B''	 103 ``C''     104 ``D''     105 ``E''
     106 ``F''	   107 ``G''	 110 ``H''     111 ``I''     112 ``J''
     113 ``K''	   114 ``L''	 115 ``M''     116 ``N''     117 ``O''
     120 ``P''	   121 ``Q''	 122 ``R''     123 ``S''     124 ``T''
     125 ``U''	   126 ``V''	 127 ``W''     130 ``X''     131 ``Y''
     132 ``Z''	   141 ``a''	 142 ``b''     143 ``c''     144 ``d''
     145 ``e''	   146 ``f''	 147 ``g''     150 ``h''     151 ``i''
     152 ``j''	   153 ``k''	 154 ``l''     155 ``m''     156 ``n''
     157 ``o''	   160 ``p''	 161 ``q''     162 ``r''     163 ``s''
     164 ``t''	   165 ``u''	 166 ``v''     167 ``w''     170 ``x''
     171 ``y''	   172 ``z''


</PRE>
<H2>RETURN VALUES</H2><PRE>
     The <B>isalnum</B>() function returns zero if the character tests false and re-
     turns non-zero if the character tests true.


</PRE>
<H2>SEE ALSO</H2><PRE>
     <B><A HREF="ctype.html">ctype(3)</A></B>,	<B><A HREF="isalpha.html">isalpha(3)</A></B>,  <B><A HREF="isdigit.html">isdigit(3)</A></B>,  <B><A HREF="ascii.html">ascii(7)</A></B>


</PRE>
<H2>STANDARDS</H2><PRE>
     The <B>isalnum</B>() function conforms to ISO 9899: 1990 (``ISO C'').

BSD				 June 4, 1993				     1
</PRE>
<HR>
<ADDRESS>
Man(1) output converted with
<a href="http://www.oac.uci.edu/indiv/ehood/man2html.html">man2html</a>
</ADDRESS>
</BODY>
</HTML>
